<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .width-center{
            width: 300px;
            text-align: center;
            margin: 0 auto;

        }
    </style>
</head>
<body>
        <div class="width-center">
            <img src="qianmengQRcode.jpg" alt="">
        </div>

</body>
</html>